initial cleanup and mapping
This commit is contained in:
unknown
286
examples/lcd.c
Normal file
286
examples/lcd.c
Normal file
@@ -0,0 +1,286 @@
|
||||
/*
|
||||
* lcd.c:
|
||||
* Text-based LCD driver.
|
||||
* This is designed to drive the parallel interface LCD drivers
|
||||
* based in the Hitachi HD44780U controller and compatables.
|
||||
*
|
||||
* This test program assumes the following:
|
||||
*
|
||||
* 8-bit displays:
|
||||
* GPIO 0-7 is connected to display data pins 0-7.
|
||||
* GPIO 11 is the RS pin.
|
||||
* GPIO 10 is the Strobe/E pin.
|
||||
*
|
||||
* For 4-bit interface:
|
||||
* GPIO 4-7 is connected to display data pins 4-7.
|
||||
* GPIO 11 is the RS pin.
|
||||
* GPIO 10 is the Strobe/E pin.
|
||||
*
|
||||
* Copyright (c) 2012-2013 Gordon Henderson.
|
||||
***********************************************************************
|
||||
* This file is part of wiringPi:
|
||||
* https://projects.drogon.net/raspberry-pi/wiringpi/
|
||||
*
|
||||
* wiringPi is free software: you can redistribute it and/or modify
|
||||
* it under the terms of the GNU Lesser General Public License as published by
|
||||
* the Free Software Foundation, either version 3 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* wiringPi is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU Lesser General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU Lesser General Public License
|
||||
* along with wiringPi. If not, see <http://www.gnu.org/licenses/>.
|
||||
***********************************************************************
|
||||
*/
|
||||
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <stdint.h>
|
||||
|
||||
#include <unistd.h>
|
||||
#include <string.h>
|
||||
#include <time.h>
|
||||
|
||||
#include <wiringPi.h>
|
||||
#include <lcd.h>
|
||||
|
||||
#ifndef TRUE
|
||||
# define TRUE (1==1)
|
||||
# define FALSE (1==2)
|
||||
#endif
|
||||
|
||||
static unsigned char newChar [8] =
|
||||
{
|
||||
0b11111,
|
||||
0b10001,
|
||||
0b10001,
|
||||
0b10101,
|
||||
0b11111,
|
||||
0b10001,
|
||||
0b10001,
|
||||
0b11111,
|
||||
} ;
|
||||
|
||||
|
||||
// Global lcd handle:
|
||||
|
||||
static int lcdHandle ;
|
||||
|
||||
/*
|
||||
* usage:
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
int usage (const char *progName)
|
||||
{
|
||||
fprintf (stderr, "Usage: %s bits cols rows\n", progName) ;
|
||||
return EXIT_FAILURE ;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* scrollMessage:
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
static const char *message =
|
||||
" "
|
||||
"Wiring Pi by Gordon Henderson. HTTP://WIRINGPI.COM/"
|
||||
" " ;
|
||||
|
||||
void scrollMessage (int line, int width)
|
||||
{
|
||||
char buf [32] ;
|
||||
static int position = 0 ;
|
||||
static int timer = 0 ;
|
||||
|
||||
if (millis () < timer)
|
||||
return ;
|
||||
|
||||
timer = millis () + 200 ;
|
||||
|
||||
strncpy (buf, &message [position], width) ;
|
||||
buf [width] = 0 ;
|
||||
lcdPosition (lcdHandle, 0, line) ;
|
||||
lcdPuts (lcdHandle, buf) ;
|
||||
|
||||
if (++position == (strlen (message) - width))
|
||||
position = 0 ;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* pingPong:
|
||||
* Bounce a character - only on 4-line displays
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
static void pingPong (int lcd, int cols)
|
||||
{
|
||||
static int position = 0 ;
|
||||
static int dir = 0 ;
|
||||
|
||||
if (dir == 0) // Setup
|
||||
{
|
||||
dir = 1 ;
|
||||
lcdPosition (lcdHandle, 0, 3) ;
|
||||
lcdPutchar (lcdHandle, '*') ;
|
||||
return ;
|
||||
}
|
||||
|
||||
lcdPosition (lcdHandle, position, 3) ;
|
||||
lcdPutchar (lcdHandle, ' ') ;
|
||||
position += dir ;
|
||||
|
||||
if (position == cols)
|
||||
{
|
||||
dir = -1 ;
|
||||
--position ;
|
||||
}
|
||||
|
||||
if (position < 0)
|
||||
{
|
||||
dir = 1 ;
|
||||
++position ;
|
||||
}
|
||||
|
||||
lcdPosition (lcdHandle, position, 3) ;
|
||||
lcdPutchar (lcdHandle, '#') ;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* waitForEnter:
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
static void waitForEnter (void)
|
||||
{
|
||||
printf ("Press ENTER to continue: ") ;
|
||||
(void)fgetc (stdin) ;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* The works
|
||||
*********************************************************************************
|
||||
*/
|
||||
|
||||
int main (int argc, char *argv[])
|
||||
{
|
||||
int i ;
|
||||
int lcd ;
|
||||
int bits, rows, cols ;
|
||||
|
||||
struct tm *t ;
|
||||
time_t tim ;
|
||||
|
||||
char buf [32] ;
|
||||
|
||||
if (argc != 4)
|
||||
return usage (argv [0]) ;
|
||||
|
||||
printf ("Raspberry Pi LCD test\n") ;
|
||||
printf ("=====================\n") ;
|
||||
|
||||
bits = atoi (argv [1]) ;
|
||||
cols = atoi (argv [2]) ;
|
||||
rows = atoi (argv [3]) ;
|
||||
|
||||
if (!((rows == 1) || (rows == 2) || (rows == 4)))
|
||||
{
|
||||
fprintf (stderr, "%s: rows must be 1, 2 or 4\n", argv [0]) ;
|
||||
return EXIT_FAILURE ;
|
||||
}
|
||||
|
||||
if (!((cols == 16) || (cols == 20)))
|
||||
{
|
||||
fprintf (stderr, "%s: cols must be 16 or 20\n", argv [0]) ;
|
||||
return EXIT_FAILURE ;
|
||||
}
|
||||
|
||||
wiringPiSetup () ;
|
||||
|
||||
if (bits == 4)
|
||||
lcdHandle = lcdInit (rows, cols, 4, 11,10, 4,5,6,7,0,0,0,0) ;
|
||||
else
|
||||
lcdHandle = lcdInit (rows, cols, 8, 11, 10, 0,1,2,3,4,5,6,7) ;
|
||||
|
||||
if (lcdHandle < 0)
|
||||
{
|
||||
fprintf (stderr, "%s: lcdInit failed\n", argv [0]) ;
|
||||
return -1 ;
|
||||
}
|
||||
|
||||
lcdPosition (lcdHandle, 0, 0) ; lcdPuts (lcdHandle, "Gordon Henderson") ;
|
||||
lcdPosition (lcdHandle, 0, 1) ; lcdPuts (lcdHandle, " wiringpi.com ") ;
|
||||
|
||||
waitForEnter () ;
|
||||
|
||||
if (rows > 1)
|
||||
{
|
||||
lcdPosition (lcdHandle, 0, 1) ; lcdPuts (lcdHandle, " wiringpi.com ") ;
|
||||
|
||||
if (rows == 4)
|
||||
{
|
||||
lcdPosition (lcdHandle, 0, 2) ;
|
||||
for (i = 0 ; i < ((cols - 1) / 2) ; ++i)
|
||||
lcdPuts (lcdHandle, "=-") ;
|
||||
lcdPuts (lcdHandle, "=3") ;
|
||||
|
||||
lcdPosition (lcdHandle, 0, 3) ;
|
||||
for (i = 0 ; i < ((cols - 1) / 2) ; ++i)
|
||||
lcdPuts (lcdHandle, "-=") ;
|
||||
lcdPuts (lcdHandle, "-4") ;
|
||||
}
|
||||
}
|
||||
|
||||
waitForEnter () ;
|
||||
|
||||
lcdCharDef (lcdHandle, 2, newChar) ;
|
||||
|
||||
lcdClear (lcdHandle) ;
|
||||
lcdPosition (lcdHandle, 0, 0) ;
|
||||
lcdPuts (lcdHandle, "User Char: ") ;
|
||||
lcdPutchar (lcdHandle, 2) ;
|
||||
|
||||
lcdCursor (lcdHandle, TRUE) ;
|
||||
lcdCursorBlink (lcdHandle, TRUE) ;
|
||||
|
||||
waitForEnter () ;
|
||||
|
||||
lcdCursor (lcdHandle, FALSE) ;
|
||||
lcdCursorBlink (lcdHandle, FALSE) ;
|
||||
lcdClear (lcdHandle) ;
|
||||
|
||||
for (;;)
|
||||
{
|
||||
scrollMessage (0, cols) ;
|
||||
|
||||
if (rows == 1)
|
||||
continue ;
|
||||
|
||||
tim = time (NULL) ;
|
||||
t = localtime (&tim) ;
|
||||
|
||||
sprintf (buf, "%02d:%02d:%02d", t->tm_hour, t->tm_min, t->tm_sec) ;
|
||||
|
||||
lcdPosition (lcdHandle, (cols - 8) / 2, 1) ;
|
||||
lcdPuts (lcdHandle, buf) ;
|
||||
|
||||
if (rows == 2)
|
||||
continue ;
|
||||
|
||||
sprintf (buf, "%02d/%02d/%04d", t->tm_mday, t->tm_mon + 1, t->tm_year+1900) ;
|
||||
|
||||
lcdPosition (lcdHandle, (cols - 10) / 2, 2) ;
|
||||
lcdPuts (lcdHandle, buf) ;
|
||||
|
||||
pingPong (lcd, cols) ;
|
||||
}
|
||||
|
||||
return 0 ;
|
||||
}
|
||||
Reference in New Issue
Block a user